Hydroturbine pumping apparatus



fiaprii 18, 1933. NASH 1,904,323

HYDROTURBINE PUMPING APPARATUS Filed me 1, 1931 5 Sheets-Sheet 1 April 18, 1933.

H. L. NASH HYDROTURBINE PUMPING APPARATUS Filed June 1, 1931 '3 sheets-sheet 2 April 18, 11933. H. L. NASH 1,904,321

HYDROTURB I NE PUMP I NG APPARATUS Filed June 1, 1951 3 Sheets-Sheet 5 Patented Apr. 18, 1933' STATES! PATENT OFFICE HAROLD L. NASH, OI SOUTH HOBWALK, CONNECTICUT, ASSIGNOR '10 NASH ENGINEER- f IKG comm, 0] SOUTH HOB'WALK, CONNECTICUT, A. CORPORATION OF IOUT ' HYDROTUBBINE PUMPING- APPARATUS Application filed June 1,

This invention relates to pumping apparatus of the type in which water or some equivalent liquid is used to produce the pumping action. Such pumps are commonly used to increase the pressure of a volume of air or and effective for comparatively low pressure work but are not so well adapted to higher pressure ranges. v

It is the general object of my invention to improve the construction of hydro-turbine pumping apparatus of this general type, to the end that the apparatus may be made available for substantially. increased pressure ranges.

In the accomplishment of this purpose, I preferably remove a portion of the pumping liquid at a certain point in the cycle of glimping operations and restore the liquid at igher ressure at a later point in the pumping cycle. y thus removing a portion of the pumping liquid and thereafter replacing the same by liquid at higher pressure, lam able to efiec tively discharge the air or gas at a higher pressure than was previously practicable.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particular 1y pointed out in the appended claims.

Preferred forms oi my invention are shown in the drawings, in which Fig. l is a sectional elevation of a hydroturbine pump," 7

, Fig. 2 is a sectional elevation of a similar pump modified to embody my improvements;

Figs. 3 and l are partial sectional elevations showing all ht modifications of the con struction shown in Fig. 2; V

Fig. 5 is a sectional elevation oil a double lobe pump embodying my improvements, and

Fig. 6 is a-sectional elevation showing a slight further modification.

Referring first-to Fig. 2, my improved bydro-turbine pump comprises a casing 1.9 provided with a chamber 11 of non-circular cross section, in which a rotor'l2 is mounted on a driving shaft 13 for rotation in the direction of the arrow a.

1981. seri l No. 541,194.

' along the rotor between the side walls of the casing 10, with the ends of the blade closely adjacent to said walls. The blades and adj acent side walls thus rovide buckets. B adapted to be filled wit wathr or liquid contained in the chamber 11.

The chamber 11 is also provided with an inlet port 20 and with an outlet or'discha-rge port 21. A peripheral outlet assage 22 is provided at one point in the eye e of pumping operations, and a similar inlet passage 24 is provided at a later point in the cycle of operations. Any suitable supplementary pumping apparatus may be rovided between the passages 22 and 24, suc apparatus being indicated diagrammatically at P in Fig. 2;

In order to clearly explain the operation coacting with the side walls of the casing to form buckets, all as previously described.

It will be noted that the outer wall of the chamber 31 closely approaches the ends of the blades 35 at the points AA in Fig. 1, so that the water or liquid W is forced into the buckets at this point and substantially fills the buckets, as indicated at B.

Beginning at the inlet ports 32, the casing 30 is gradually enlarged in the direction of rotor movement, allowing the liquid W in the full buckets B to move outward as the full buckets pass the inlet ports 32, thus leaving spaces in the bottoms of the buckets in which a partial vacuum is formed. Under these conditions, the air or gas to be pumped flows in through the inlet ports 32 to fill these low pressure spaces. The inner line assumed by the pumping liquid W is shown at 36 (Fig.

. 33. A rotor 34: is provided with blades 35, l

' pump.

I itieiiy the same into the rotor buckets and forcing the air or gas out of the buckets through the outlet ports 33.

This is the usual operation of this commercial type of hydro-turbine pump, which is commonl double-acting, as shown in Fig. i.

Let it do now assumed that the lower ouriet port 33 in Fig. 1 is closed. We wiii now have air under compression in the ho from of the bucket B which is adjacent the ciosed outlet port end we will also have an amount of liquid at hand which is suificient to comat 21 in Fig. 2, and iii iiquid under higher pre%ure is injected the buckets through the iniee passage 52s, as the approach the disch rge pore $31, ere wiii he suhsien i under increased pressure and con-see a the sir or gas in the buckets B he our through the port 21 under correspondingiy increased pressure.

'Consequenfly, sdvencing she discharge port to e. isier' point in the pumping cycie, end by removing" or portion of the pumping iiquid from. the pumping chamber and thereafter injecting iiq'uid nude? increased pressure, if one eiole to step-up or boost she sir pressure and to discherge the sir or sgeinsc in higher pressure thou hes heen here co'fore considered prsc-ticeicie for this "cype instead of removing ihe iicguid the point Where she discharge port preuiousiy iocused, as indicated hy pipe 22 in Fig. 2, i may s; the some resuit positioning she ousie't pipe 40 (Fig. 3) as on eoriier porno in the pumping cycle, correspondingiy reducing the radius of the casing at the some point, es indicated at i. The reduction in cross section of the casing so this poins should suosientisiiy correspond to 'uhecross section of the outlet pessege 4Q.

I may even go furijher sud locate the outiet passage 44% (Fig. 4) opposite the inietpors 29. in this case, the cross section of ihe pumping chsmher Wiii he reduced through out the non-circuisr enlargement thereof by on emouns suhsizentieiiy corresponding to the passage is. In oil \L-hree Eorins, Figs. :2, 3 end 1-, the ureter iine if will remain suhsteniocesiouss the asier line so in Fig. 1.

While I here iudiceiced the pessuge22 so neosesi leading to e. pump 3?, and the passage 24 es being supplied by the pump P, it will he understood that it is not necessary to restore the liquid to she casing which was obstructed therefrom, but that the liquid delivered through the passage 24 may he obtained from 'a storage tank T (Fig. 3) of liquid under pressure, or from any other convenient source of supply. Also the pump P may have s. connection 46 (Fig. 2} to an additional source of suppiy, so thus the liquid drawn in through the outlet passage 22 may he suppiemen wd to make up for leakage or other losses.

The edvencing of the discharge port 21 in the direction of rotation beyond the previous point of discharge necessiiates a. grescer circumferential space for each pumping cycle then has been previously required. in order to provide ehis increased circumferential space, i may increase the diameter of she rotor and correspondingiy increase the size of the casing, as indicated in Fig. 5, to provide as double-aching or iwodohe pump, or 1 may somewhui, reduce the size of the rotor and ceasing end provide the singie-ecting mechanism shown in Fig. 3. either case, the method of operation is the some as previously described.

A very important sdvsniage of my inveniion iies in fast time the sir or gee is first pieced under s suhs'tentisi iniiizd pressure hy the usuoi operation of the hydroiurhiue pump, which pressure is cheresfier increased hy injec'cing additional iiquid under suhstsnizieiiy higher pressure a point adjeceni; the discharge port.

Having zthus described my iuvencion end the edvun seges thereoi, i do no; wish he he iiinieed iahe deieiis herein disclosed, otherwise than es sei. forth in the claims, hut whee E oieim is 2- 1. 'Puniping spporetus comprising a. hydro-turbine pump having 9. pumping" Chi! her oi non-circular cross session and pnwid ed Wish iniec and discharge pores, seid chemher being periphersiiy enlarged from s. point edjucen". the inlet port end heing iheree'fier peripheroliy concreci'ed toward she dis-cherge por s e. rocor mounted in seid chamber end o piureiity oi dispiocemene chenihers, said pump using as iiquid for iis pumping ection, which liquid is rendered effecsiye to portioiiy compress charges oi or gee in said dispiscerneni; chomhershy the veI. city of ssid iiuuid end the peripheroi contrsciion oi" she. pumping chamber, means providing s discharge passage for u. portion of mid pumping iicguid from the periphery of said pumping chamber oi one point in the cycle of pumping opersiions, and moons to restore sinaiior emoun'b or iiquid directly in sheperiphery of said pumping chsmher ail e ieter point in the pumping cycle and at 2. pressure su stensieiiy higher than the norof the liquid he removed, from ihe pumping cher.

2. Pumping eppei'etus ccmpris e hydro-turhine pump huving u pumping chemher of non-circuler cross section and proviclexl with inlet and ilischarge ports, seifl chamber heing peripherally enlarged from c oint ed- ?ecent the inlet port and bein i ereeiter peripherally connected towercl 13%9 discharge 1c pom and e rotor mounted in said chummr uucl having e plurality of displacement chumhers, suicl pump using c liquiii for its umpiug ucizion, which liquid is rendered e ective to partially compress charges of uii or gee 15 in eei l displacement chambers by the velocity of said liquid and izhe peripherel cont-ruclion of {she pumping chamber, an auxiliary pump, an outlet connection from a, point in the periphery oi said pumping chamber to said auxiliary pump, and an inlet connection "from said pump directly into seiu pumping chamber at a, point in the periphery of said pumping chumher mljecent the discharge port of suiu hyflro-iurhine pump, suid mixiliui'y pump opci'uiing at higher pressure than seiu hydro-"turbine pump.

in i/esiony whereof I have hereunto effixec'l my signuiuie.

HunoLn n. uusu. 

